| 摘要 |
PURPOSE:To facilitate confirming a load current prior to testing by providing plural triode AC switches (TRIACs), an input means and a detecting means, etc. and preventing malfunction of the actual performance test and load accompanied by this test automatically. CONSTITUTION:Since electric currents flowed into TRIACs 11, 12 while driving load are monitored by respective electric current sensors 20, 26, the detection of malfunction of TRIACs 11, 12 can be made prior to the actual performance tests. Further, when the actual performance tests of TRIACs 11, 12 are made, the operation of a transistor 24 is stopped by an input signal 21 of the 2nd group and the voltage supply to a gate 12a is stopped to make TRIAC 12 nonoperating state and this state is confirmed by the sensor 26. Then, an input signal 14 of the first group is inputted on trial and the TRIAC 11 is made operating state based on a pulse outputted from a majority logical circuit 16 and a micro electric current flowed through TRIAC 11 and resistance 23 is detected by the sensor 20 to confirm soundness of the power supply circuit. |
